Carex plantaginea aka Plantainleaf Sedge

Carex plantaginea is a perennial sedge from eastern North America. Its common names include plantainleaf sedge and seersucker sedge. It belongs to the sedge family, Cyperaceae. The name refers to leaves that look like plantain leaves. This woodland plant grows slowly and forms low clumps. It keeps some or all of its leaves through winter.

Garden size varies among the sources. RHS gives heights and widths up to 1.6 feet [0.5 metres]. NC State lists heights of 0.5–3 feet [0.15–0.91 metres]. Its listed width is 0.8–1 foot [0.25–0.30 metres]. The broad green leaves provide its main garden interest. They have a glossy surface, puckered texture, and smooth edges. Purple sheaths surround the leaf bases. The leaves are broad for a sedge and have no hairs. Thin flower stems may show green and dark purple stripes.

Flowering dates also vary among sources. Missouri Botanical Garden lists March to April; Chicago lists May to June. NC State gives early spring through early summer. RHS describes summer flowers in shades of cream and gold. Male spikes are purple-brown, while female spikes are green. The upright spikes add interest above the leafy clumps. Small, dry fruits called achenes follow the flowers. Birds and small mammals eat them and shelter among the plants. The leaves also feed the larvae of some satyrine butterflies.

Shade or part shade suits its woodland character. NC State warns that full sun can harm it. RHS and Chicago also list sunny sites, so their guidance differs. Moist soil rich in organic matter is a sound choice. RHS supports a range of soil types and pH levels. Good drainage suits it, though NC State also notes wet-soil tolerance. Missouri Botanical Garden lists some tolerance of drought and dry soil. Its USDA range is 4–8 there, extending to zone 3 at NC State. RHS rates its UK hardiness H7.

Use it along shaded paths, in borders, or beneath woodland plants. Groups can form ground cover, but they cannot take foot traffic. Its leaf texture also suits rock gardens, pond edges, and pots. Deer tend to leave it alone. The sources report no major pest or disease problems. Routine pruning is unnecessary; remove dead growth in spring if needed. Divide clumps in spring to make more plants.